Installation Instructions

Transcription

1 38MGR Multi-zone Outdoor Unit Ductless System Sizes 18, 24, 30, 36 and 48 Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS... 2 GENERAL... 2 PARTS LIST... 3 SYSTEM REQUIREMENTS... 4 PIPING REQUIREMENTS... 4 WIRING... 5 DIMENSIONS... 6 CLEARANCES INSTALLATION GUIDE INSTALLATION TIPS OUTDOOR UNIT INSTALLATION ELECTRICAL DATA CONNECTION DIAGRAMS SYSTEM VACUUM AND CHARGE NOTES: Read the entire instruction manual before starting the installation. Image for illustration purposes only. Actual model may be slightly different. START UP OUTDOOR UNIT DIAGNOSTIC GUIDES... 17

2 SAFETY CONSIDERATIONS Installing, starting up, and servicing air conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start up, and service this equipment. Untrained personnel can perform basic maintenance functions such as coil cleaning. All other operations should be performed by trained service personnel. When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves. Keep a quenching cloth and fire extinguisher nearby when brazing. Use care in handling, rigging, and setting bulky equipment. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and current editions of the National Electrical Code ( NEC ) NFPA 70. In Canada, refer to current editions of the Canadian electrical code CSA Recognize safety information. This is the safety alert symbol!!. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and CAUTION. These words are used with the safety alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.! WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing, modifying, or servicing system, the main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start up. GENERAL These instructions cover the installation, start up and servicing of the multi zone outdoor unit connected to up to five indoor fan coil units. For approved combinations, refer to the product data document. 2

3 PARTS LIST Table 1 Parts List PART NO. PART NAME QTY. 1 Outdoor unit 1 - Literature package including installation instructions and warranty 1 - Grommet to secure the outdoor unit (helps with vibration prevention during unit operation) 4 - Drain Joint 1 - Drain Hose 1 - Conversion Joints (see Table 4) - Outdoor 1 Fig. 1 - Parts List A NOTES: If the outdoor unit is higher than the indoor unit, prevent rain from flowing into the indoor unit along the connection pipe by making a downward arc in the connection pipe before it enters the wall to the indoor unit. This ensures that rain drips from the connection pipe before it enters the wall. Piping and the interconnecting wiring are field supplied. The illustration above is only a sketch. Different models may be differ slightly. The following units are covered in these installation instructions. Table 2 Unit Sizes SYSTEM TONS kbtuh VOLTAGE - PHASE OUTDOOR MODEL / MGRQ18B / MGRQ24C / MGRQ30D / MGRQ36D / MGRQ48E--3 3

4 SYSTEM REQUIREMENTS Allow sufficient space for airflow and service of the unit. See Fig. 2 for the required minimum distances between the unit, walls or ceilings. PIPING REQUIREMENTS IMPORTANT: Both refrigerant lines must be insulated separately. The minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m). The following lengths are allowed. Table 3 lists the pipe sizes for the outdoor unit. For the indoor unit pipe sizes refer to the indoor unit installation instructions. Table 3 Piping and Refrigerant SYSTEM SIZE 18K 24K 30K 36K 48K Min. Piping Length per each indoor unit ft (m) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3) Standard Piping Length per each indoor unit ft (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) Max. outdoor-indoor height difference (OU higher than IU) ft (m) 49 (15) 49 (15) 49 (15) 65 (20) 65 (20) Max. outdoor-indoor height difference (IU higher than OU) ft (m) 49 (15) 49 (15) 49 (15) 65 (20) 65 (20) Max. height different between indoor units ft (m) 32 (10) 32 (10) 32 (10) 32 (10) 32 (10) Max. Length per each indoor unit ft (m) 82 (25) 98 (30) 115 (35) 115 (35) 115 (35) Piping Max. Piping Length with no additional refrigerant charge per System ft (m) 49 (15) 74 (22.5) 98 (30) 123 (37.5) 123 (37.5) (Standard Piping length x No. of Zones) Total Maximum Piping Length per system ft (m) 131 (40) 197 (60) 263 (80) 328 (100) 328 (100) Refrigerant Additional refrigerant charge (between Standard Max piping length) Suction Pipe Size Liquid Pipe Size Oz/ft (g/m) in (mm) in (mm) 0.16 (15) 0.16 (15) 0.16 (15) 0.16 (15) 0.16 (15) 3/8*2 (9.5*2) 1/4 *2 (6.3*2) 3/8*3 (9.5*3) 1/4 *3 (6.3*3) 1/2*1+3/8*3 (12.7*1+9.5*3) 1/4 *4 (6.3*4) 1/2 *2+3/8*2 (12.7*2+9.5*2) 1/4 *4 (6.3*4) 1/2 *2+3/8*3 (12.7*2+9.5*3) 1/4 *5 (6.3*5) Refrigerant Type R410A R410A R410A R410A R410A Charge Amount Lbs (kg) 4.41 (2.0) 6.17 (2.8) 6.61 (3.0) (4.6) (4.6) NOTES: The refrigerant charge included is adequate for the outdoor unit s maximum number of zones multiplied by the standard piping length per zone. For piping runs greater than the Maximum Piping Length with no additional refrigerant charge per System, see Additional Refrigerant Charge (see Table 5). Refrigerant Piping: Line sets to be sized based on the connection size of the indoor unit. Each pipe should be insulated individually. Conversion Joints: The outdoor unit includes a package of conversion joints to facilitate installation of the various fan coil sizes. These joints are to be connected to the outdoor unit as needed to match the line set size. Table 4 Conversion Joints No. of Zones Size Adaptor Qty. 2 zone 18 3/8 --1/2 2 3 zone 24 3/8 --1/2 3 3/8 --1/2 3 4 zone 30 1/2 --3/8 1 1/4 --3/8 1 1/2 --5/8 1 4 zone 5 zone Table 5 Additional Refrigerant Charge Additional Charge Required Unit Size No. of Zones Charge oz. (kg.) After ft. (m) /2 --3/8 2 1/4 --3/8 2 1/2 --5/8 2 3/8 --1/2 3 Additional Charge oz./ft. (g/m) Total Maximum Piping Length ft. (m.) (2.0) 49 (15) 0.16 (15) 131 (40) (2.8) 74 (22.5) 0.16 (15) 197 (60) (3.0) 98 (30) 0.16 (15) 263 (80) (4.6) 123 (37.5) 0.16 (15) 328 (100) (4.6) 123 (37.5) 0.16 (15) 328 (100) Additional Refrigerant Calculation Sum Total Liquid Pipe ft. (m) - Additional Charge Required After ft. (m.) x Additional Charge oz./ft. (g/m) 0.16 (15) NOTES: If the calculation results in a negative number no additional refrigerant is required. Electronic expansion valves in the outdoor unit are used as metering devices. 4

5 WIRING All wires must be sized per NEC (National Electrical Code) or CEC (Canadian Electrical Code) and local codes. Use Electrical Data table MCA (minimum circuit amps) and MOCP (maximum over current protection) to correctly size the wires and the disconnect fuse or breakers respectively. Per the caution note, only stranded copper conductors with a 600 volt insulation rating wire must be used. Recommended Connection Method for Power and Communication Wiring: The main power is supplied to the outdoor unit. The field supplied 14/3 stranded wire with ground with a 600 volt insulation rating, power/communication wiring from the outdoor unit to indoor unit consists of four (4) wires and provides the power for the indoor unit. Two wires are line voltage AC power, one is communication wiring (S) and the other is a ground wire. Wiring between indoor and outdoor unit is polarity sensitive. The use of BX wire is NOT recommended. If installed in a high Electromagnetic field (EMF) area and communication issues exists, a 14/2 stranded shielded wire can be used to replace L2 and (S) between outdoor unit and indoor unit landing the shield onto ground in the outdoor unit only.! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Wires should be sized based on NEC and local codes. Use copper conductors only with a 600 volt insulation rating wire.! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Be sure to comply with local codes while running wire from the indoor unit to the outdoor unit. Every wire must be connected firmly. Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Ensure all wiring is tightly connected. No wire should touch the refrigerant tubing, compressor or any moving parts. Disconnecting means must be provided and shall be located within sight and readily accessible from the air conditioner. Connecting cable with conduit shall be routed through the hole in the conduit panel. 5

6 DIMENSIONS Table 6 Dimensions UNIT SIZE Height in (mm) 27.6 (703) (810) (810) (1333) (1333) Width in (mm) (845) (946) (946) (1045) (1045) Depth in (mm) (335) (386) (386) (380) (380) Weight-Net lbs (kg) (48) (68) (71) (101.5) (101.5) NOTES: Master valves are not available on the size 18 unit. Fig. 2 - Outdoor Dimensions Size 18 6

7 DIMENSIONS (CONTINUED) Gas Line Liquid Line Fig. 3 - Outdoor Dimensions Size 24 Gas Line Liquid Line Fig. 4 - Outdoor Dimensions Size 30 7

8 DIMENSIONS Gas Line Liquid Line Fig. 5 - Outdoor Dimensions Size 36 8

9 DIMENSIONS Gas Line Liquid Line Fig. 6 - Outdoor Dimensions Size 48 9

10 CLEARANCES A Air-inlet E D B C Air-outlet Fig. 7 - Clearances Outdoor Table 7 Clearances Outdoor Values MINIMUM VALUE UNIT in. (mm) A 24 (609) B 24 (609) C 24 (609) D 4 (101) E 6 (152) NOTES: Outdoor Unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth. 9.8in (25cm) or more for proper airflow 24in (61cm) or more is recommended for service 118in (300cm) or more 19in (48cm) or more on a multiple parallel unit arrangement 4in (10cm) or more on a single parallel unit arrangement 9.8in (25cm) or more for proper airflow 24in (61cm) or more is recommended for service 59in (150cm) or more on a multiple parallel unit arrangement 24in (61cm) or more on a single parallel unit arrangement 24in (60cm) or more Fig. 8 - Clearances for multiple units 10

11 INSTALLATION GUIDE Up to five fan coil units can be connected to one outdoor unit. Refer to the product data for approved combinations. INSTALLATION TIPS Ideal installation locations include: Outdoor Unit A location which is convenient to installation and not exposed to strong winds. A location which can bear the weight of the outdoor unit and where the outdoor unit can be mounted in a level position. A location with appropriate clearances as outlined in Fig. 7. Do not install the indoor or outdoor units in a location with special environmental conditions. For those applications, contact your Ductless representative. OUTDOOR UNIT INSTALLATION 1. Use a rigid base to support unit in a level position. 2. Locate the outdoor unit and connect piping and wiring.! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Excessive torque can break flare nut depending on installation conditions. NOTES: Install the outdoor unit on a rigid base to reduce noise levels and vibration. Determine the optimal air outlet direction to prevent discharged air from being blocked. If the installation site is exposed to strong winds such as a coastal areas, ensure the fan s proper operation by installing the unit lengthwise along the wall or use dust or shield plates. If the unit needs to be suspended, the installation bracket should comply with the suspension requirements in the installation bracket diagram. The installation wall should be solid brick, concrete or the same intensity construction, or take steps to reinforce and dampen the support. The connection between the bracket and the wall as well as the bracket and the air conditioner should be firm, stable and reliable. Ensure there is no obstacle which may block the radiating air. Strong wind Avoid sags in the suction line to prevent the formation of oil traps. Insulate each tube with minimum 3/8 in. (10 mm) wall thermal pipe insulation. Inserting the tubing into the insulation before making the connections saves time and improves installation quality. 1. The unit is equipped with multiple pairs of service valves. Each pair is clearly marked (color and letter) to identify the indoor unit circuits. In the outdoor unit wiring area, each indoor unit interconnecting terminal block is marked (letter) the same as the corresponding pair of service valves. The indoor units must be piped and wired in matched sets (A to A; B to B, etc.). 2. It is not required to use all of the available fan coil connections if the application does not require them at the current time. The system can be expanded at any time. 3. Conversion joints are supplied with the outdoor unit. They are required for certain fan coil combinations. These joints are to be connected to the outdoor unit as needed to match the line set size. 4. Remove the service connection, if provided with the unit. 90 Oblique Roughness Burr Fig Cut the Pipe 5. Remove all the burrs from the cut cross section of the pipe avoiding any burrs inside the tubes. 6. Remove the flare nuts attached to the indoor and outdoor units. 7. Install the correct size flare nut onto the tubing and make a flare connection. Refer to Table 8 for the flare nut spaces. Table 8 Flare Nut Spacing OUTER DIAM. (mm) A (mm) Max. Min. Ø1/4 (6.35) 0.05 (1.3) 0.03(0.7) Ø3/8 (9.52) 0.06 (1.6) 0.04(1.0) Ø1/2 (12.7) 0.07 (1.8) 0.04(1.0) Ø5/8 (15.88) 0.09 (2.2) 0.08(2.0) Bar "A" Bar Copper pipe Clamp handle Handle Yoke Cone Red arrow mark Fig Flare Nut Spacing 8. Apply a small amount of refrigerant oil to the flare connection on the tubing. 9. Align the center of the pipes and/or the service valve. A07350 Fig. 9 - Wind Installation MAKE REFRIGERANT PIPING CONNECTIONS (OUTDOOR UNIT) IMPORTANT: Use refrigeration grade tubing ONLY. No other type of tubing may be used. Use of other tubing types will void the manufacturer s warranty. Piping Guide: Do not open service valves or remove protective caps from tubing ends until all the connections are made. Bend the tubing with bending tools to avoid kinks and flat spots. Keep the tubing free of dirt, sand, moisture, and other contaminants to avoid damaging the refrigerant system. unit tubing Flare nut Piping Fig Align Pipe Center 10. Connect both the liquid and gas piping to the indoor unit. 11. Tighten the flare nut using a torque wrench as specified in Table Complete the installation. Table 9 Tightening Torque PIPE DIAMETER TIGHTENING TORQUE INCH (mm) Ft-lb N-m Ø1/4 (6.35) 10 to to 17.6 Ø3/8 (9.52) 24 to to 42.0 Ø1/2 (12.7) 37 to to 62.3 Ø5/8 (15.88) 50 to to

12 INSTALL ALL POWER AND INTERCONNECTING WIRING TO OUTDOOR UNIT 1. Mount the outdoor power disconnect. 2. Run power wiring from the main box to the disconnect per NEC and local codes. 3. Remove the field wiring cover (if available) from the unit by loosening the screws. 4. Remove the caps on the conduit panel. 5. Connect the conduit to the conduit panel (see Fig. 13). 6. Properly connect both the power supply and control lines to the terminal block per the connection diagram. 7. the unit in accordance with NEC and local electrical codes. 8. Use the lock nuts to secure the conduit. 9. Reinstall the field wiring cover.! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Be sure to comply with local codes while running wire from indoor unit to outdoor unit. Every wire must be connected firmly. Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, ensure all wiring is tightly connected. No wire should be allowed to touch the refrigerant tubing, compressor or any moving parts. Disconnecting means must be provided and shall be located within sight and readily accessible from the air conditioner. Connecting cable with conduit shall be routed through hole in the conduit panel. Outdoor unit Terminal Block Over 1.57" (40mm) G Conduit panel Conduit DRAIN CONNECTIONS Install drains must meet local sanitation codes. Install the outdoor unit drain joint Fit the seal into the drain joint, then insert the drain joint into the base pan hole of the outdoor unit. Rotate 90 to securely assemble them. Connect the drain joint with an extension drain hose to avoid condensate from draining off the outdoor unit during the heating mode. Seal Drain joint Base pan Base pan hole Seal Drain joint Fig Drain Joint Images are for illustration purposes only.! CAUTION In cold climates, ensure the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it can freeze in the hose and flood the unit. NOTES: Basepan built in with multiple holes for proper draining during defrost. For applications where it is required to seal these holes, and re direct the condensate drain, rubber plugs are available through RCD. Table 10 Rubber Plugs Outdoor Unit Model Number Basepan Base Rubber Plugs RCD Part Number Quantity per unit 38MGRQ18B A MGRQ24C--3 38MGRQ30D A MGRQ36D--3 38MGRQ48E A Fig Field Wiring A07455 ELECTRICAL DATA Table 11 Multi zone Outdoor Unit UNIT SIZE SYSTEM VOLTAGE OPERATING VOLTAGE COMPRESSOR OUTDOOR FAN VOLT / PHASE / HZ MAX / MIN* RLA FLA HP W MCA MOCP /1/ / x x *Permissible limits of the voltage range at which the unit will operate satisfactorily. LEGEND FLA - Full Load Amps MCA - Minimum Circuit Amps MOCP - Maximum Over Current Protection RLA - Rated Load Amps 12

13 CONNECTION DIAGRAMS Unit A Unit A Power Supply L1 L2 S Unit B Unit B Power Supply L1 L2 S FIELD POWER SUPPLY L2 L1(A) L2(A) S(A) L1(B) L2(B)S(B) Main Power to Power to Power Supply Unit A Unit A Unit B Unit B Fig Connection Diagram Size 18K 2 Zone Unit A Unit A Power Supply L1 L2 S Unit B Unit B Power Supply L1 L2 S Unit C Unit C Power Supply L1 L2 S FIELD POWER SUPPLY L2 L1(A) L2(A) S(A) L1(B) L2(B) S(B) L1(C) L2(C) S(C) Main Power to Power Supply Unit A Unit A Power to Power to Unit B Unit B Unit C Unit C Fig Connection Diagram Size 24K 3 Zone Unit A Unit A Power Supply L1 L2 S Unit B Unit B Power Supply L1 L2 S Unit C Unit C Power Supply L1 L2 S Unit D Unit D Power Supply L1 L2 S FIELD POWER SUPPLY L2 L1(A) L2(A) S(A) L1(B) L2(B) S(B) L1(C) L2(C) S(C) L1(D) L2(D)S(D) Main Power to Power Supply Unit A Unit A Power to Power to Power to Unit B Unit B Unit C Unit C Unit D Unit D Fig Connection Diagram Size 30K 4 Zone 13

14 CONNECTION DIAGRAMS (CONTINUED) Unit A Unit A Power Supply L1 L2 S Unit B Unit B Power Supply L1 L2 S Unit C Unit C Power Supply L1 L2 S Unit D Unit D Power Supply L1 L2 S FIELD POWER SUPPLY L2 L1(A) L2(A) S(A) L1(B) L2(B) S(B) L1(C) L2(C) S(C) L1(D) L2(D)S(D) Main Power Supply Power to Power to Power to Power to Unit A Unit A Unit B Unit B Unit C Unit C Unit D Unit D Fig Connection Diagram Size 36K 4 Zone Unit A Unit A Power Supply L1 L2 S Unit B Unit B Power Supply L1 L2 S Unit C Unit C Power Supply L1 L2 S Unit D Unit D Power Supply L1 L2 S Unit E Unit E Power Supply L1 L2 S FIELD POWER SUPPLY L2 L1(A) L2(A) S(A) L1(B) L2(B) S(B) L1(C) L2(C) S(C) L1(D) L2(D)S(D) L1(E) L2(E)S(E) Main Power Supply Power to Power to Power to Power to Power to Unit A Unit A Unit B Unit B Unit C Unit C Unit D Unit D Unit E Unit E Fig Connection Diagram Size 48K 5 Zone 14

15 SYSTEM VACUUM AND CHARGE! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Never use the system compressor as a vacuum pump. Refrigerant pipes and indoor unit coils should be evacuated using the recommended 500 microns deep vacuum method. The alternate triple evacuation method may be used if the following procedure is followed. Always break a vacuum with dry nitrogen. NOTES: All units (except the 18,000 BTU model) have a Master Suction and Liquid Line Service Valve. Using Vacuum Pump 1. Completely tighten the flare nuts of the liquid and gas pipes on the indoor and outdoor side (for all fan coils) (see Fig 20). Outdoor Unit Refrigerant Gas Side Unit 10. Reference Table 5 when additional charge is needed. 11. Disconnect the charge hoses and manifold gauge. 12. Using a hexagonal wrench, fully open all the gas and liquid service valves for the size 18 and all the Master Gas and Liquid service valves for sizes (see Fig. 21). Master Gas Port Master Service Valves Individual Service Valves Liquid Side Service Valve Fig Service Valves 2. For size 18, DO NOT open the Gas or Liquid service valves until the evacuation is complete. For sizes 24 48, fully open all the connected Individual Service Valves (with the line set attached). DO NOT open the Master Service Valves until the evacuation is complete (see Fig 22). 3. For size 18, connect the manifold gauge (low side hose) to the Individual Service Valve (5/16 port, use the adapter to fit a 1/4in hose) to evacuate each of the circuits. For sizes 24 48, connect the manifold gauge (low side hose) to the Master service valve (5/16 port, use the adapter to fit a 1/4in. hose) to evacuate all circuits at the same time (see Fig. 24). 4. Connect the charge hose to the vacuum pump (see Fig. 23). 5. Open (fully) the low pressure valve of the manifold gauge (see Fig. 23 for 18. Fig.24 for sizes 24 48). 6. Start the vacuum pump. 7. Evacuate using either the deep vacuum or the triple evacuation method (see Fig. 25 and 26). 8. After the evacuation is complete, fully close the low pressure valve of the manifold gauge and stop the vacuum pump operation. 9. Insert a hexagonal wrench into each Gas Side Service Valve for size 18 or into the Master Gas Side Service Valve for sizes and open the valve by turning the wrench 1/4 counterclockwise. Listen for gas to exit the system (see Fig. 21). Fig Service Valves Sizes NOTES: The Master valve utilizes a 5/16 port. Manifold Gauge Compound gauge Pressure gauge 500 microns Low pressure valve Low pressure hose Gas Line and Port Gas Service valve pressure valve Charge hose Fig Manifold Gauge Vacuum pump Liquid Line Open valves to all connected ports for evacuation Flare nut Fig Manifold Sizes Valve body Valve stem Cap Fig Service Valve Diagram 15

16 Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gauge capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water (see Fig. 25). MICRONS LEAK IN SYSTEM MINUTES Fig Deep Vacuum Graph VACUUM TIGHT TOO WET TIGHT DRY SYSTEM A95424 Triple Evacuation Method The triple evacuation is the recommended method of dehydration. Refer to Fig. 26 and proceed as follows: 1. Pump the system down to 1500 microns and allow the pump to continue operating for an additional 15 minutes. 2. Close the service valves and shut off the vacuum pump. 3. Connect a dry nitrogen cylinder and regulator to the system and break vacuum until the system reaches 2 psig. 4. Close the service valve and allow the system to stand for 1 hr. During this time, the dry nitrogen can diffuse throughout the system absorbing moisture. 5. Pump the system down to 1000 microns. 6. Break the vacuum with dry nitrogen (2 psig). 7. Pump the system down to 500 microns. 8. Perform the hold test for 30 minutes. START UP! CAUTION DO NOT apply power to the outdoor unit if the Master Service Valves are not fully open. Compressor damage will occur. TEST OPERATION Perform a test operation after completing a gas leak and electrical safety check. Review the indoor unit installation instructions and owner s manual for additional start up information. SYSTEM CHECKS 1. Conceal the tubing where possible. 2. Ensure the drain tube slopes downward along its entire length. 3. Ensure all tubing and connections are properly insulated. 4. Fasten the tubes to the outside wall, when possible. 5. Seal the hole through which the cables and tubing pass. OUTDOOR UNIT 1. Are there unusual noises or vibrations during operation? Explain the Following Items to the Customer (with the aid of the Owner s Manual): 2. Explain care and maintenance. 3. Present the installation instructions to the customer. EVACUATE TO 1500 MICRONS BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG EVACUATE TO 1000 MICRONS BREAK VACUUM WITH DRY NITROGEN TO 2 PSIG EVACUATE TO 500 MICRONS MINIMUM (HOLD FOR 30 MINUTES) CHECK FOR TIGHT, DRY SYSTEM (IF IT HOLDS DEEP VACUUM) RELEASE CHARGE INTO SYSTEM BY OPENING VALVES COMPLETELY Fig Triple Evacuation Method Final Tubing Check IMPORTANT: Ensure the factory tubing on both the indoor and outdoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, making sure wire ties on the feeder tubes are secure and tight. 16

17 OUTDOOR UNIT DIAGNOSTIC GUIDES For ease of service, the systems are equipped with a diagnostic code display LED on both the indoor and outdoor units. The outdoor diagnostic is displayed on the outdoor unit microprocessor board. There may be a few error codes displayed on the indoor unit that might relate to the outdoor unit s problems. If possible, always check the diagnostic codes displayed on the indoor unit first. In standby, the LED displays. In the compressor operation, the LED displays the running frequency. In the defrosting mode, the LED displays df or alternative displays between the running frequency and df (each appears for 0.5s). During the compressor pre heating cycle, the LED displays PH or alternative displays between the running frequency and PH (each appears for 0.5s). During the oil return process, the LED displays RO or alternative displays between the running frequency and RO (each appears for 0.5s). In the low ambient cooling mode, the LED displays LC or alternative displays between the running frequency and LC (each appears for 0.5s). In the forced cooling mode, the LED displays FC or alternative displays between the running frequency and FC (each appears for 0.5s). When PFC module protection occurs three times within 15 minutes, the LED displays E6 or alternative displays between the running frequency and E6 (each appears for 0.5s). In protection or malfunction, the LED displays an error code or a protection code. The diagnostic codes displayed on the outdoor units are listed on Table 12. OUTDOOR UNIT DISPLAY Table 12 Outdoor Unit Error Display LED STATUS INDOOR UNIT DISPLAY E0 Outdoor EEPROM malfunction F4 E2 Communication malfunction between indoor and outdoor units E1 E3 Communication malfunction between IPM board and outdoor main board E4 Open or short circuit of outdoor temperature sensor (T3 T4 T5 T2B) F2/F1/F3/F6 E5 protection P1 E6 PFC module protection E8 Outdoor fan speed has been out of control (Only for DC fan motor models) F5 E9 Wrong wiring connection of 24K indoor unit F1 No A unit coil outlet temp. sensor or connector of sensor is defective F2 No B unit coil outlet temp. sensor or connector of sensor is defective F3 No C unit coil outlet temp. sensor or connector of sensor is defective F4 No D unit coil outlet temp. sensor or connector of sensor is defective F5 No E unit coil outlet temp. sensor or connector of sensor is defective F6 No F unit coil outlet temp. sensor or connector of sensor is defective P0 Temperature protection of compressor top P2 P1 pressure protection P2 P2 Low pressure protection P2 P3 Current protection of compressor F0 P4 Temperature protection of compressor discharge P5 temperature protection of condenser P6 IPM module protection P0 17

18 Copyright 2017 CAC/BDP W. Morris St. Indianapolis, IN Edition Date: 08/17 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. 18 Catalog No: IM-38MGR-02 Replaces: 38MGR-01SI